注射用油的质量要求中,说法正确的是()
A.碘值越高越好
B.酸价越高越好
C.酸价越低越好
D.皂化价越高越好
E.皂化价越低越好
参考答案:C
. Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.
A.exposed
B.threatened
C.constructed
D.conserved
下列属于商品包装作用的有()。
A.保护商品
B.便于势必(识别)
C.便于流通
D.提升价值